塑殼斷路器型號規格

塑殼斷路器（英文簡稱為(wei)MCCB）主(zhu)要(yao)作用是為(wei)低壓配電系統和電動(dong)機保(bao)護回路中的(de)過載、短路提供特殊(shu)的(de)保(bao)護功能。由于(yu)其可靠性和穩定性，因此，成為(wei)工(gong)業上應用十分(fen)廣泛的(de)產(chan)品(pin)。

塑殼(ke)斷路(lu)器(qi)不同的(de)型號有不同的(de)尺寸。斷路(lu)器(qi)一(yi)般由觸頭系(xi)統、滅弧系(xi)統、操(cao)作機構、脫扣器(qi)、外殼(ke)等構成(cheng)。

塑殼斷(duan)路(lu)器的型號(hao)(hao)開頭3個字母為系(xi)列代號(hao)(hao)有NS,NSX,NSE,CVS,EZD。代號(hao)(hao)之后是(shi)開關殼架(jia)電流+開關分斷(duan)能力(li)代號(hao)(hao)，如NSX100N殼架(jia)電流100A。分斷(duan)能力(li)N為50KA。

開關(guan)極數和(he)脫扣器(qi)類型和(he)開關(guan)額定電流如:NSX100N3P3DTM25D NSX系(xi)列，殼架(jia)電流100A,3P3D為3極,TMD為熱磁脫扣25為額定電流25A。

塑殼式(shi)斷(duan)路器一般用(yong)于配(pei)(pei)電(dian)(dian)饋線(xian)控制和保護，小型配(pei)(pei)電(dian)(dian)變壓(ya)器的低壓(ya)側出線(xian)總開關(guan)，動(dong)力配(pei)(pei)電(dian)(dian)終端(duan)控制，也可用(yong)于各種生(sheng)產機械(xie)的電(dian)(dian)源開關(guan)。

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斷路器殼架等級

斷(duan)路(lu)器殼(ke)架等級額定電流(liu)(liu)是指(zhi)基本尺(chi)寸相同的(de)框架和(he)塑料外殼(ke)中能裝的(de)最大脫(tuo)扣器的(de)額定電流(liu)(liu)。

斷(duan)路器(qi)(qi)(qi)額(e)定(ding)(ding)電(dian)(dian)(dian)流(liu)是指(zhi)斷(duan)路器(qi)(qi)(qi)中的脫扣器(qi)(qi)(qi)能長(chang)期(qi)通過的電(dian)(dian)(dian)流(liu)，又稱斷(duan)路器(qi)(qi)(qi)脫扣器(qi)(qi)(qi)額(e)定(ding)(ding)電(dian)(dian)(dian)流(liu)。

同一(yi)系(xi)(xi)列中(zhong)(zhong)有(you)多(duo)種殼(ke)(ke)架(jia)(jia)等(deng)(deng)級(ji)(ji)額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)，同一(yi)殼(ke)(ke)架(jia)(jia)等(deng)(deng)級(ji)(ji)額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)中(zhong)(zhong)又有(you)多(duo)種額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)。例如DZ20系(xi)(xi)列中(zhong)(zhong)有(you)100、225、400、630、800、1250等(deng)(deng)殼(ke)(ke)架(jia)(jia)等(deng)(deng)級(ji)(ji)額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)，而100殼(ke)(ke)架(jia)(jia)等(deng)(deng)級(ji)(ji)額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)中(zhong)(zhong)有(you)16A、20A、25A、32A、40A、50A、63A、80A、100A額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu);225A殼(ke)(ke)架(jia)(jia)等(deng)(deng)級(ji)(ji)額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)中(zhong)(zhong)有(you)100A，125A、160A、180A、200A、225A額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)。DZ20—100和(he)DZ20—225兩種殼(ke)(ke)架(jia)(jia)等(deng)(deng)級(ji)(ji)中(zhong)(zhong)都有(you)100A額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)，但斷(duan)路(lu)(lu)器(qi)(qi)體積外(wai)形和(he)分斷(duan)能(neng)力不相同，因此(ci)在選用時要(yao)把型號(hao)填寫完整(zheng)即(ji)具體的(de)殼(ke)(ke)架(jia)(jia)等(deng)(deng)級(ji)(ji)額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)內的(de)斷(duan)路(lu)(lu)器(qi)(qi)額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)。額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)分級(ji)(ji)是按(an) (1.25)優先系(xi)(xi)數(shu)來(lai)選擇(ze)的(de)：一(yi)方(fang)面是符合和(he)滿足最大線路(lu)(lu)和(he)電(dian)(dian)(dian)(dian)器(qi)(qi)元件額(e)(e)(e)(e)定(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)的(de)需要(yao);另一(yi)方(fang)面是為了(le)標準化，以取得最佳的(de)使(shi)用導線及(ji)加工的(de)效益。因此(ci)它(ta)所規定(ding)(ding)的(de)級(ji)(ji)別是：3(6)、8、10、12.5、16，20、25、32、40、50、63、80，100、125、160、200、250、315、400A等(deng)(deng)。由于此(ci)規定(ding)(ding)，當線路(lu)(lu)計(ji)算(suan)負(fu)載為90A時，則只能(neng)選100A規格(ge)，因此(ci)在一(yi)定(ding)(ding)程(cheng)度上影響它(ta)的(de)保護性能(neng)。

脫扣器電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)整定(ding)(ding)(ding)值是(shi)(shi)(shi)指(zhi)脫扣器調(diao)整到動作電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)值。它(ta)是(shi)(shi)(shi)指(zhi)額(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)In的(de)(de)倍(bei)數，是(shi)(shi)(shi)動作電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)值，例如：過電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)整定(ding)(ding)(ding)到電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)1.2、1.3、5、10倍(bei)，就(jiu)寫成(cheng)Ir=1.2In，1.3In、5In、10In等。現在一些(xie)電(dian)(dian)(dian)子脫扣器，它(ta)的(de)(de)過載長延時額(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)是(shi)(shi)(shi)可調(diao)的(de)(de)，所調(diao)整的(de)(de)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，其實(shi)仍是(shi)(shi)(shi)額(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)，是(shi)(shi)(shi)可長期(qi)通過的(de)(de)最大(da)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)。

額(e)定工(gong)(gong)作電(dian)流是斷路器在裝輔助觸(chu)頭(附件)時觸(chu)點在一(yi)定工(gong)(gong)作電(dian)壓下的實(shi)際工(gong)(gong)作電(dian)流，電(dian)流為3A或6A，用(yong)于控制和保護(hu)回路。

塑殼斷路器選型

1、阻抗百分比-與變壓器短路電壓百分比相等

阻抗電壓百分比又稱短路電壓百分比，表明變壓器內阻抗的大小。變(bian)(bian)壓(ya)(ya)(ya)(ya)器的(de)短路(lu)阻(zu)抗百分(fen)比,在數值上與變(bian)(bian)壓(ya)(ya)(ya)(ya)器短路(lu)電(dian)(dian)壓(ya)(ya)(ya)(ya)百分(fen)比相等(deng)。它是(shi)指將變(bian)(bian)壓(ya)(ya)(ya)(ya)器二次繞(rao)阻(zu)短路(lu)，在一(yi)次繞(rao)阻(zu)施(shi)加(jia)電(dian)(dian)壓(ya)(ya)(ya)(ya)，當二次繞(rao)阻(zu)通過額定電(dian)(dian)流時，一(yi)次繞(rao)阻(zu)施(shi)加(jia)的(de)電(dian)(dian)壓(ya)(ya)(ya)(ya)與額定電(dian)(dian)壓(ya)(ya)(ya)(ya)之比的(de)百分(fen)數。

變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)的(de)短路(lu)阻(zu)抗(kang)(kang)值(zhi)百(bai)分比(bi)是變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)的(de)一個(ge)重要參數(shu),它(ta)(ta)表(biao)明變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)內(nei)阻(zu)抗(kang)(kang)的(de)大小，即(ji)變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)在額定負荷運行(xing)時變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)本(ben)身的(de)阻(zu)抗(kang)(kang)壓(ya)(ya)降大小。它(ta)(ta)對于變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)在二次側發生(sheng)突然短路(lu)時，會產生(sheng)多大的(de)短路(lu)電流有(you)決定性(xing)的(de)意(yi)(yi)義(yi)，對變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)制造價(jia)格大小和變(bian)(bian)(bian)壓(ya)(ya)器(qi)(qi)并列運行(xing)也有(you)重要意(yi)(yi)義(yi)。

由于(yu)這些特點(dian)，于(yu)是短路阻(zu)抗(kang)值習慣使(shi)用(yong)百(bai)分比(bi)數(shu)值。如果在某些場(chang)合需要使(shi)用(yong)實際數(shu)值計算，當然要換算。

2、額定電壓選擇

即塑料(liao)外(wai)殼式斷路器的(de)電(dian)(dian)壓(ya)等級是多少，常見(jian)的(de)抵押配(pei)(pei)電(dian)(dian)系(xi)(xi)統(tong)為400v，如小區(qu)住宅(zhai)區(qu)，配(pei)(pei)電(dian)(dian)房的(de)配(pei)(pei)電(dian)(dian)電(dian)(dian)壓(ya)配(pei)(pei)比為10/0.4，一般采用TN-C-S或TN-S系(xi)(xi)統(tong)，變壓(ya)器的(de)中(zhong)性點直接(jie)接(jie)地，當(dang)然也不排除690v，如風電(dian)(dian)場新能源發(fa)電(dian)(dian)，所以選擇(ze)斷路器額(e)定(ding)電(dian)(dian)壓(ya)與系(xi)(xi)統(tong)電(dian)(dian)壓(ya)相(xiang)適應(ying)，塑(su)殼斷路器的(de)極限分段(duan)能力與額(e)定(ding)電(dian)(dian)壓(ya)息息相(xiang)關。

3、額定極限分斷電流ICU

根據GB14048.2低壓(ya)斷(duan)路(lu)器標準(zhun)，是指斷(duan)路(lu)器一次短路(lu)后(hou)不要求再(zai)承受(shou)起額定(ding)電流的分斷(duan)能力，后(hou)者(zhe)一般為前(qian)者(zhe)的百分之25，50，75，100。

塑(su)殼(ke)斷(duan)(duan)路(lu)器的額(e)定(ding)極(ji)限分(fen)斷(duan)(duan)電(dian)流ICU和(he)額(e)定(ding)運行短路(lu)電(dian)流ics與額(e)定(ding)電(dian)壓有關系，同一型(xing)號(hao)的塑(su)殼(ke)斷(duan)(duan)路(lu)器在不同額(e)定(ding)電(dian)壓下，其分(fen)斷(duan)(duan)能力不一樣，電(dian)壓能級越高滅弧(hu)越困難，斷(duan)(duan)路(lu)器能分(fen)斷(duan)(duan)的短路(lu)電(dian)流越低(di)。如(ru)下圖塑(su)殼(ke)斷(duan)(duan)路(lu)器NSX100F，在85/415v電(dian)壓下，分(fen)斷(duan)(duan)能力為36kA,660/690v額(e)定(ding)電(dian)壓下為8KA。

4、短路器的額定電流

斷路器的額定電流等于額定不間斷電流Iu且(qie)等于約(yue)定自由(you)空(kong)氣發熱電(dian)流(liu)Ith，也(ye)就(jiu)是(shi)斷(duan)路(lu)(lu)(lu)器能(neng)連續(xu)承載且不超高溫升的(de)電(dian)(dian)流(liu)(liu)，斷(duan)路(lu)(lu)(lu)器的(de)殼架電(dian)(dian)流(liu)(liu)指斷(duan)路(lu)(lu)(lu)器能(neng)裝(zhuang)的(de)最(zui)大(da)的(de)過電(dian)(dian)流(liu)(liu)脫(tuo)扣(kou)器的(de)額(e)定(ding)電(dian)(dian)流(liu)(liu)，如NSX100斷(duan)路(lu)(lu)(lu)器有兩種(zhong)反時(shi)限過電(dian)(dian)脫(tuo)扣(kou)器的(de)額(e)定(ding)電(dian)(dian)流(liu)(liu)等級40A和100A，100A是(shi)NSX100F的(de)殼架電(dian)(dian)流(liu)(liu)，反時(shi)限過電(dian)(dian)流(liu)(liu)脫(tuo)扣(kou)器整(zheng)定(ding)電(dian)(dian)流(liu)(liu)是(shi)根(gen)據線(xian)路(lu)(lu)(lu)計(ji)算電(dian)(dian)流(liu)(liu)和導體長期運行電(dian)(dian)流(liu)(liu)在脫(tuo)扣(kou)器上整(zheng)定(ding)的(de)電(dian)(dian)流(liu)(liu)值。